Base-burning stove.



HOFFMAN BASE BURNING STOVE.

APPLI GATION FILED FEB.G

Patented May 31, 1910.

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W.V W. HOFFMAN. BASE BURNING STOVE. APPLICATION FILED 21:13.11, 1906.

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@ibm/@aow man D. c. ANDREW s. nimm co wommmm wAsNI g riafrnnfr onnion WILLIAM W. HOFFMAN, OF LA FAYETTE, INDIANA.

BASE-BURNING STOVE.

To all whom it may concern:

Be it known that I, WILLIAM TV. Horr- MAN, a citizen of the United States, residing at La Fayette, in the county of Tippecanoe and State of Indiana, have invented a new and useful Improvement in Base- Burning Stoves, of which the following is a specification.

My invention relates to improvements in base burning stoves and the object of my invention is to provide a stove in which either hard or soft coal may be burned, and which will utilize for heating purposes a larger proportion than usual of the heat produced by combustion, the percentage of heat escaping through the chimney being smaller than in ordinary stoves.

A further object of my invention is to cause a thorough circulation of the air in the room by drawing in the cold air from a point very near the floor, passing it around the hre-pot, where it is heated, and sending it out into the room at a comparatively low point, it being well known that in cold weather the air on the floor of a room is usually much colder than that near the ceilino.

J:lilith these objects in view, my invention consists in the construction and combinations of parts as hereinafter described and claimed.

In the accompanying drawings-Figure l is a vertical section of a stove embodying my invention, and Fig. 2 is a cross section thereof on the line 2 2 of Fig. l. Fig. 3 is a vertical section of a stove without the oven attachment.

a represents the shell of a stove of the ordinary upright type, which may be of any desired shape. Near the bottom of this shell is located an ash chamber, provided with an ash receptacle b, which chamber opens at the front of the stove and is supported at the rear by being attached to the air pipe g, which is secured in any suitable manner to the shell. This ash chamber has an opening in its top, over which is fitted a grate c. The front opening of the ash chamber is closed by a door having a damper 0, by which the draft through the grate is regulated. Above the ash chamber is another chamber d, open at the front and top, the walls of the chamber CZ being fitted to the top of the ash chamber. In the chamber cl is supported the fire-pot e, made flaring at the top, as shown, so as to fit over and Specification of Letters Patent.

Application filed February 6, 1906.

Patented May 31, 1910.

Serial No. 299,750.

completely close the top of the chamber d. The fire-pot e rests down upon the top of the ash chamber, whereby an open space is formed around the fire-pot, which is entirely open at the front part of the stove.

g is a pipe leading from the bottom of the stove into the chamber d, admitting air from beneath the stove to said chamber, where it is heated and thrown out, through the opening in front, into the room, ata comparatively low point.

7L represents a pipe telescoping within the pipe g, in which it may be moved up or down easily. By sliding the pipe 7L down sufficiently, all the air supplied to the chamber d will be drawn from a point immediately above the floor.

Above the lire-pot, and suspended from the top of the stove, is a double walled magazine, having two walls z' and y', the outer wall being cylindrical and the inner one flaring downward, leaving an opening be tween the lower ends of the wall. y

7c represents a movable cover, through which the magazine may be filled, and Z spacing lugs to keep the lower ends' of the walls z' and y' at the proper distance from each other.

m represents a pipe running from beneath the bottom of the stove up through the body thereof, and into and through the wall z', discharging air through the opening m into the space between the walls t' and y'. This pipe draws in cold air from beneath the stove, and as the air moves along it is heated and finally discharged downwardly above the fuel in the lire-pot. rIhe amount of air supplied through the pipe m is regulated by a damper n, shown in dotted lines in Fig. l. lThe pipe m is also provided with a branch m3, running through the shell a and provided with a valve n2. Vhen the valve a is closed and the valve n2 opened, air, which rises through the pipe m and which also becomes heated in its upward movement, will be delivered into the room.

m2 represents a pipe adapted to telescope and slide freely within the lower part of the pipe m.

To the back of the stove an oven s is attached, which oven is surrounded on three sides by walls t, forming an air space therearound, a door, not shown, being provided at each end of the oven. The air spaces above and below the oven are connected with the open space immediately within the shell, and

dampers u and a2 are provided to regulate the flow of the heated air and the products ot combustion, so that they may be caused to flow either above the oven or below the oven, or on three sides thereof. The top ot the oven is provided with lids ai and an extension y to which the exit pipe is secured, which connects with the chimney.

lt should be noted, as shown in the drawing, that there is a clear space between the shell of the stove extending down below the bottom of the ash chamber fr, except as interrupted by the pipes g and m. A passage l extends trom the space beneath the ash-pit to the flue located immediately under the oven, and its function is to deliver 'he products of combustion directly `ipon the bottom of the oven.

ln Fig. 3 is shown a stove embodying' the same principles as shown in Figs. l and 2, but without the oven attachment. The passage l is, in this case, lirectly connecting with the flue pipe 2, the construction in every other respect being substantially unchanged.

claim l. Tie combination of a shell and a hollow base, said shell formed with an opening in one of its sides, air heating and ash chambers situated within the lower portion ot the shell and spaced from the sides t-hereot', forming communications between the upper portion of the shell and the base, said air heating chamber being in communication with said opening, a tire-pot situated within said air heating chamber and forming a closure for the upper end thereof, exit tlues for the products of combustion connnunicating with the upper portion of the shell and with the base, and means for supplying air to said heating chamber, substantially as described.

2. The combination of a shell and a hollow base, said shell being formed with an opening in one of its sides, air heating and ash chambers situated within the lower portion ot' the shell and spaced from the sides thereof, forming communications between the upper portion of the shell and the base, said air heating chamber being in communication with said opening, a tire-pot situated within said air heating chamber and forming closure for the upper end thereof, exit lines for the products of combustion, communicating with the upper portion of the shell and with the base, and a telescopic pipe for delivering air to said air heating chamber through the base, substantially as described.

3. The combination of a shell and a hollow base, said shell being formed with an opening in one of its sides, air heating and ash chambers situated within the lower portion of the shell and spaced from the sides thereof, forming communications between the upper portion of the shell and the base, said air heating chamber being in communication with said opening, a lire-pot situated within said air heating chamber and forming a closure tor the upper end thereof, exit iues for the products of combustion, communicating with the upper portion of the shell and with the base, a. magazine, and pipes for delivering air to the air heating chamber and to the magazine or room through the base, substantially as described.

et. The combination ot' a shell and a hollow base, said shell formed with an opening in one of its sides, air heating and ash chambers situated within the lower portion of the shell and spaced from the sides thereof, forming communications between the upper portion ot the shell and the base, said air heating chamber being in communication with said opening, a tire-pot situated within said air heating chamber and forming a closure for the upper end thereof, a maga- Zine, pipes for delivering air to the air heating chamber and to the magazine or room, and an oven attached to the back of said stove and having Hues above and below said oven, provided with valves therein, said Haes communicating with the upper-portion ot the shell and with the base, respectively, substantially as described.

VVLLAM W'. HOFFMr-hhl.

1iilitnesses HinAM Burton, FRANK Bonson. 

